diff options
Diffstat (limited to 'drivers/pwm/pwm-lpss.h')
| -rw-r--r-- | drivers/pwm/pwm-lpss.h | 49 |
1 files changed, 49 insertions, 0 deletions
diff --git a/drivers/pwm/pwm-lpss.h b/drivers/pwm/pwm-lpss.h new file mode 100644 index 000000000..8e82eb5a7 --- /dev/null +++ b/drivers/pwm/pwm-lpss.h @@ -0,0 +1,49 @@ +/* SPDX-License-Identifier: GPL-2.0-only */ +/* + * Intel Low Power Subsystem PWM controller driver + * + * Copyright (C) 2014, Intel Corporation + * + * Derived from the original pwm-lpss.c + */ + +#ifndef __PWM_LPSS_H +#define __PWM_LPSS_H + +#include <linux/device.h> +#include <linux/pwm.h> + +#define MAX_PWMS 4 + +struct pwm_lpss_chip { + struct pwm_chip chip; + void __iomem *regs; + const struct pwm_lpss_boardinfo *info; +}; + +struct pwm_lpss_boardinfo { + unsigned long clk_rate; + unsigned int npwm; + unsigned long base_unit_bits; + /* + * Some versions of the IP may stuck in the state machine if enable + * bit is not set, and hence update bit will show busy status till + * the reset. For the rest it may be otherwise. + */ + bool bypass; + /* + * On some devices the _PS0/_PS3 AML code of the GPU (GFX0) device + * messes with the PWM0 controllers state, + */ + bool other_devices_aml_touches_pwm_regs; +}; + +extern const struct pwm_lpss_boardinfo pwm_lpss_byt_info; +extern const struct pwm_lpss_boardinfo pwm_lpss_bsw_info; +extern const struct pwm_lpss_boardinfo pwm_lpss_bxt_info; +extern const struct pwm_lpss_boardinfo pwm_lpss_tng_info; + +struct pwm_lpss_chip *pwm_lpss_probe(struct device *dev, void __iomem *base, + const struct pwm_lpss_boardinfo *info); + +#endif /* __PWM_LPSS_H */ |